Machine tool



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19 Sheets-Sheet 19 Filed May 12, 1932 1/1087? ("07* [OW/4R0 P. Bun/am Patented July 23, 1935 UNITED STATES PATENT OFFICE MACHINE 'roor.

Edward P. Burrell, Shaker Heights, Ohio, as-

signor to The Warner & Swasey Company, Cleveland, Ohio, a corporation of Ohio Application May 12, 1932, Serial No. 610,904 43 Claims. -(Cl. 82-32) This invention relates to a machine tool and temperature as to maintain said parts and lubriparticularly to a system for controlling the temcant substantially at a desired temperature. perature of those parts of a machine tool which A further object is to provide in a machine tool are subject to temperature changes during the means for controlling the temperature of certain operation of the machine. parts of the machine and the lubricant therefor,

Heretofore the quality of the cutting tools used which includes means for circulating a fluid in machine tools has precluded the use of high through the driving pulley of the machine. operating speeds for the machine since the tools A further object is to provide a machine tool would break down when engaged with the work. construction embodying means for controlling the [0 The slow operating speeds under the old practemperature of certain parts of the machine and tice did not produce in the various operative parts the lubricant therefor, which is of such character of the machine sufiicient heat to be detrimental that simplified castings may be used in the mato the machine or to said parts. chine and diflicult coring of the same substantially Under present day operating practice for maeliminated.

chine tools the quality of the cutting tools is such A still further and more specific object is to that high operating speeds are usually imparted provide a machine tool construction wherein the to certain of the movable parts, resulting in a head of the machine is a separate unit applicable substantially greater degree of heat being deas such to the bed of the machine, and wherein veloped in the bearings, spindles, shafts and other said head unit and the part of the machine which a parts of the machine, as well as in the lubricant supports it and to which it is attached are formed for lubricating said parts, thus rendering it neceswith cooperating portions providing means for sary that efiicientmeans be provided for cooling controlling the temperature of certain parts of the lubricant and such parts of the machine. the machine and the lubricant therefor.

The heat developed by such parts of the ma- Additional and further Objects W pp chine and in the lubricant, of course, results in hereinafter during the following detailed descripwear and distortion of the machine due to the tion of anumber of embodiments of the invention. greater expansion of certain parts of the machine Referring to t accompanying drawings than occurs in other parts thereof. closing a number of embodiments of the inven- An object of the invention is to provide in a tion: 1

machine tool efiicient and effective means for Figure l isafragmentary front elevational view 30 controlling the temperature of certain parts of of a machine tool, showing particularly the head the machine and of the lubricant therefor that of the machine with the pulley and blower guard are subject to temperature changes during operremoved; ation. Fig. 2 is an end elevational view of the ma- Another object is to provide means in a machine illustrated in Fig. 1, taken from the left- 35 chine tool for maintaining the correct relationhand side of Fig. l, and shows the leg of the ship between various parts of the machine that machine housing the motor; I are subject to temperature changes during oper- Fig. 3 is a fragmentary irregularsection taken ation, to the end t a the efficiency and acy substantially on line 3--3 of Fig. 2, looking in the 0f the machme W111 be letameddirection of the arrows, with certain parts omit- 40 Another object is to provide in a machine tool pasageways in the l i through which? fluid Fig. 4'is a transverse sectional view taken sub- .uculated and whlch passageways are trmnged stantially on line 4-4 of Fig. 3, looking in the ,adlacen? to certain parts of the machine that direction of the arrows with the cover plates subJect 9 temperature change? during operfor the segmental slots removed; anon an? adlacent to the reservoir which hol-ds Fig. 5 is atransverse section taken substantially g g g i i f wthereby g cuon line 5 5 of Fig 3 looking in the direction of c a ing ui wi con ro e empera ures of said parts and lubricant the arrows with the cover plates for the segmental Another object of the invention is to provide f 1 h entail Semen taken in a machine tool, having certain parts that are 1 i .8 3; Fi 2 lookih in subject to temperature changes during operation, 511 i on e f u g d means for circulating fluid in thermal transthe direction of the arrows, W1 e p ey an ferring relationship to said parts and to the lubblower guard 1n pos1tion; 5 ricant therefor and in such volume, velocity, and Fig. 6 1s a fragmentary detached detail v ew 

